Buyers GuideUpdated July 18, 2026
If your water heater suddenly stops producing hot water, a failed pilot light is often the cause, especially in homes with gas units. In Carol Stream, where many houses are 20 to 40 years old, we see this trouble often. Cold showers and dishes pile up quickly when your water heater won't ignite. Learning the basics of your pilot light can save headaches, or at least help you spot when it's time to call a professional.
Why Pilot Lights Matter in Carol Stream Homes
Most traditional gas water heaters in our area rely on a pilot light to ignite the burner. When this small flame goes out, the burner can't heat your water. Older homes, or those with aging water heaters, tend to have more pilot light problems because parts wear out over time. With Carol Stream's frequent temperature swings, cold winters and humid summers, your water heater works hard all year. Even a newer unit can have hiccups due to sediment buildup or minor airflow issues.
Common Reasons the Pilot Light Goes Out
- Thermocouple failure. This safety device shuts off gas flow if the pilot goes out. It can become coated with soot or stop working after years of use.
- Drafts or ventilation changes. Basement water heaters are more exposed to drafts, especially in homes with older or leaky foundation walls.
- Dirt or debris blocking the pilot orifice. Spider webs, dust, or sediment can block the gas flow to the pilot.
- Gas supply issues. Low pressure from municipal lines or a partially closed shutoff valve can prevent the pilot from staying lit.
- Faulty gas control valve. Over time, internal parts wear down and may not regulate gas flow correctly.
Safe Steps to Relight Your Water Heater Pilot
Most water heaters have instructions printed on the tank. If you're comfortable, follow these general steps. If you ever smell gas or feel unsure, call a professional immediately.
- Turn the gas control knob to "OFF." Wait several minutes for any lingering gas to dissipate.
- Set the control knob to "PILOT." Hold it down and use a long lighter or the built-in igniter to spark the flame.
- Continue holding the knob for 30-60 seconds to allow the thermocouple to heat up and signal the valve to stay open.
- Release the knob. If the pilot stays lit, turn the setting to "ON." The main burner should ignite when the thermostat calls for heat.
- If the pilot goes out again, or if you can't restart it after a couple tries, there's probably a deeper problem.
Relighting isn't always the solution. If your pilot light keeps going out, or won't stay lit after following the steps, something else is wrong and you could be dealing with a faulty thermocouple, a dirty orifice, or a failing valve. In those cases, we recommend checking out our water heater services for expert help.
When to Call for Professional Troubleshooting
A persistent pilot light problem is a warning sign. Our crew is called in frequently when folks have tried relighting over and over with no luck. Here are some signs you're better off letting a licensed plumber take a look:
- You smell gas near the water heater, even faintly. This is a safety hazard.
- The pilot ignites but goes out the moment you release the button.
- You notice visible corrosion or soot buildup around the burner assembly.
- The gas control valve feels unusually hot or has visible damage.
- Your water heater is more than 10-15 years old and has recurring ignition issues.
Sometimes the fix is a quick thermocouple swap or cleaning the pilot orifice. Other times, sediment buildup or corrosion inside the tank mean you're due for a bigger repair, or even a full replacement. Routine upkeep and flushing can extend the life of your equipment, especially with the clay soils and possible mineral content in municipal water. If leaks or water damage is found near the heater, our leak detection & repair service can pinpoint the issue before it spreads.
How Age and Local Conditions Affect Water Heaters
Homes in Carol Stream see a mix of single-family, townhouse, and condo water heaters. Many units are now reaching the 15-year mark, especially in the older neighborhoods. Aging galvanized or steel pipes supplying these tanks can contribute to ignition and sediment problems. Clay-heavy soil in our area can also affect basements, making it more likely for heaters to be exposed to moisture or humidity, which speeds up corrosion. If you have frequent clogs or slow drains around your heater, our drain cleaning crew can help clear lines and prevent backflow issues.
Regularly checking and servicing your water heater, including the pilot assembly, thermocouple, and gas connections, is the best way to avoid sudden cold showers. If you're seeing leaking pipes, old fittings, or anything that looks off on the supply lines, our pipe repair experts are used to fixing hidden issues before they create bigger headaches. And for homes with sump pits near their water heater, it's smart to schedule a sump pump checkup at the same time, excess groundwater can damage both systems.
Practical Tips for Homeowners
- Test your pilot light operation once in a while, especially after long vacations or power outages.
- Keep the area around your heater clear of dust, spider webs, and stored items to ensure good airflow.
- Install a carbon monoxide detector in the utility room for added safety.
- Have your water heater flushed every year or two to remove sediment and improve efficiency.
- Check for visible rust, moisture, or corrosion around the bottom of the tank.
If you run into stubborn pilot light issues, we can help. Our team knows the quirks of Carol Stream homes and the common headaches that come with local water and climate. Call our crew at 630-757-8459 for prompt water heater troubleshooting and repair throughout the western suburbs.